II. Short Answer Questions
1. What is a volcano? Give one example,
2. What is the difference between magma and lava?
3. Give one example each of an active volcano and a dormant volcano,
4. What is the difference between dormant volcano and an extinct volcano?
5. What is the magma chamber of a volcano? State the products erupted by a volcano.
6. Name two types of landforms made by volcanoes. Give an example of each type.
7. What is the Pacific Ring of Fire? Why is it so called?
Answers
Answer:
Volcano is a kind of magma erupter, which erupts magma that came from the core of earth by the magma pulps
Explanation:
Pacific ring of fire is a group of underwater volcano...
Answer: 1) a volcano is a rupture in the Earth's crust where molten lava, hot ash, and gases from below the Earth’s crust escape into the air.An example of a volcano is Mount St. Helens in Washington state in the U.S. An example of a volcano is the eruption of Krakatau in 1883 and the eruption of Mount Tambora in 1815, the two largest explosive and destructive volcanoes since the 1800s.
2)Scientists use the term magma : for molten rock that is underground lava : for molten rock that breaks through the Earth's surface
3)These are Active, Dormant and Extinct. Active → Active volcanoes erupt regularly examples of active volcanoes are Kīlauea in Hawaii, Mount Etna in Italy and Mount Stromboli also in Italy which has been erupting almost constantly for the last 2000 years.
4)Dormant → Dormant volcanoes are volcanoes that have not erupted in a long time but are expected to erupt again in the future. ... Extinct → Extinct volcanoes are those which have not erupted in human history.
5)A magma chamber is a large pool of liquid rock beneath the surface of the Earth. Given enough time, that pressure can gradually fracture the rock around it, creating a way for the magma to move upward. ... Explanation: State the products erupted by a volcano.
6) Volcanic landforms are divided into extrusive and intrusive landforms based on weather magma cools within the crust or above the crust. Intrusive landforms are formed when magma cools within the crust and the rocks are known as Plutonic rocks or intrusive igneous rocks.Extrusive landforms are created by igneous activity at the surface of the earth. There is wide range of volcanic landforms that includes large depressions (calderas and Maars), conical mountains (volcanoes), and broad lava plains and plateaus.
7)The Ring of Fire, also referred to as the Circum-Pacific Belt, is a path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes. ... The abundance of volcanoes and earthquakes along the Ring of Fire is caused by the amount of movement of tectonic plates in the area.
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